280

Millennium:	1st millennium
Centuries:	2nd century – 3rd century – 4th century
Decades:	250s 260s 270s – 280s – 290s 300s 310s
Years:	277 278 279 – 280 – 281 282 283

280 by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishment and disestablishment categories
Establishments – Disestablishments

Emperor Probus suppresses the revolt of the usurper Proculus.
Probus chases the Alani off to Asia Minor.
The commander of the Roman fleet on the Rhine, Bonosus, proclaims himself emperor. Defeated by Probus' troops, Bonosus hangs himself.
In Alexandria, Julius Saturninus, who is in charge of the defense of the East, is declared emperor. He withdraws to Apamea, is besieged and put to death.
Owing to the constant threat of invasion, the cities in Gaul construct or reinforce their defensive walls.

The Kingdom of Wu is dissolved by Jin, finally ending the Three Kingdoms period in the history of China.
The Gupta Empire is founded (approximate date).

The Greek mathematician Pappus demonstrates geometrically the property of the center of gravity.

Births

Saint George, soldier of the Roman Empire and later Christian martyr (or 275, approximate date)